John Culina makes excellent ivory micarta grips. You have to send him the micarta. I bought a slab of antique ivory micarta from Sheffield's Knifemaking supply and sent it to John. Here is what I got back, note that although all the grips are from the same block of micarta, they appear different hues of yellow depending on the light they are photographed in.
N-frame coke profile magna grips on a S&W 624 44spl.
Same, on a M27-2 3.5" .357 Magnum
N-frame round-to-square butt conversion on a M29-5 5" 44 Magnum
N-frame square butt, coke profile, on a S&W 44 Magnum (pre-29).
A view of the cross-section of Culina's "coke" profile.